Pump



PUMP

Filed Jan. 12, 1928 gwwwhw alto: new

v Patented May 27,1930

UNITED STATES PATENT OFFICE WILLIAM I. DERRIGK, OI DAVENPORT, IOWA, ASSIGNOR TO WESTCO-OHIPPEWA PUMP comrm, or navnnron r, IOWA,

' Pour A CORPORATION OF DELAWARE Original application filed August 18, 1927, Serial No. 213,812. Divided and this application filed January 12, 1928. Serial No. 246,178.

This invention relates to rotary pumps of the type in which suction is created at the inlet and pressure at the outlet of the pump by theximpelling action of the vanes carried ,'by the peripheral portion of a rotor and acting on fluids carried ,in an unobstructed channelextending along the peripheral por tion of the rotor from the inlet to the outlet.

This application is a division of my oopending application Serial No. 213,812 that was filed on August 18, 1927 and that is entitled Pumps.

The main objects of the present invention are to provide a rotary pump of the character above referred to that is capable of developing considerable pressure and that is simple in construction and may be manufactured at low cost;

Other objects and advantages of the present invention are to provide a pump of the character described in which the vanes are rotor that, in combination with the apertured portion of the rotor, serves to propel the liquid through the two channels and provides a channel section of substantially continuous curvilinear form which serves to reduce the frictional resistance to the movement of fluids through the pump. I

' A further object of the invention is to proi 4 vide a pump in which the rotor may be formed of a relatively thin fiat metal plate that is substantially relieved from all transverse strains produced'by differences in the-"pressure of fluids in the opposing channels and that, has its outer edge portion beyond the liquid propelling apertures of the pump formed to make a relatively close working fit with the pump casing.

With the above and other objects in view, the invention may be said to comprise the pump as illustrated in the accompanying drawings hereinafter described and particularly set forth in the appended claims, to-

gether with such variations and modifications thereof as will be apparentto one skilled in the art to which the invention appertains.

Reference should be had to the accompanying drawings forming a part of this specification in which Figure 1 is a side elevation of a pump embodying the invention, a portion of the easing being broken away to show the rotor and is provided with a peripheral inlet 5 and aperipheral outlet 6 which are relatively close together. A transverse shaft 7, which passes through packing glands 8 in the opposite walls of the casing, has a rotor 9 in the form of a fiat disc secured thereto and arranged to make a close running fit with the casing.

along its entire peripheral edge portion. The rotor disc 9 is provided with an annular row of closely spaced openings 10 that extend transversely through the disc and form between them impeller vanes 11.

Each of the sections 1 and'2 of the casing is provided upon its inner side witha channel -12 and these channels extend around the circumference of the casing from the inlet to the outlet alongside the annular row of openings in the rotor 9. Atvthe inlet and at the outlet,- the channels 12 extend past the per'iphery of the rotor through cored out passageways to form the inlet and outlet passages. The rotor 9 has a continuous peripheral portion 13 outside the annular row of openings 10 and a continuous inner portion 14 within the annular row of openings.

The casing members land 2 are formed to have fiat faces inwardly and outwardly of opposite. sides of the rotor.

the channels 12, which lie in close proximity to the portions 13 and 14 of the rotor to prevent leakage of water, the central portions of the inner faces of sections 1 and 2 being slightly recessed to provide spaces 15 upon This reduces frictional resistance on the side faces of'the rotor. The portions of the inner faces of the sections 1 and 2 of the casing between the ends of the channels 12 and lying between the inlet and outlet make close workin fit with opposite sides of the disc so that t ere can be no free flow of water from the outlet back to the inlet, the space between the ends of the channels being suflicient to cover more than one complete opening in the disc at all times during operation. The channels 12 through which the water flows from the inlet to the outlet are preferably of gradually decreasing cross sectional area from the inlet to the outlet to compensate for the increase in s eed of movement of the stream of liquid owing from the inlet to the outlet. It should also be noted that the/frictional resistance to flow of water through the pump casing is small due to the fact that a large proportion of the wall surface of the comined passageway is formed by the rotor.

Water entering through the inlet 5 divides and passes into the channels 12 extending alongopposite sides of the rotor. It is then impelled toward the .outlet by the action of the vanes 11 when the, rotor'is turning. Since the casinghas close working fit with oppo sitesides of the rotor between the inlet and outlet, the only water that can ass from the outlet to the inletis that carrie in t e openings of the 'rotor so that the pressure at the inlet. In the pump structure above described, the rotor is in the form of a substantially fiat disc outlet is not dissi ated through objectionable flow of water romth'e outlet back to the and the impeller vanes are formed by the a-nnular row of apertures through the disdinwardly of its periphery. The outer rim portion of the rotor has a close working fit with the casing that guides the rim of the rotor and chining is inexpensive and that the costof 1 'revents distortion of-the rotor due to loads imposed thereon. It will be apparent, therefore, that both the rotor and casing are'of sim 1e and compact design, that very little mac ining is required, that the required mamanufacture is low. A further advantage of the openings through the disc is that lateral thrusts on the rotor tending'to shift the same toward one 'side orthe other of the casing are eliminated.

, Furthermore, ;by providing a channel in the casing wall which extends only from the inlet to the outlet, the fiat inner faceof the wall between the inlet and outlet which lies closely adjacent the face of the rotor serves. to prevent back flow fromtheoutlet to the inlet making it unnecessary to cial means upon the interioro forpreventing the back flow.

. It will furthermore be understood that the provide spethe casing particular,forms of apparatus shown and de- 1. A rotary pump comprising a rotor in the form of a dlsc having an annular row of transverse apertures therethrough, and a casing provided with an inlet and an outlet and having walls makin a close working fit'with I each lateral face 0 the disc inwardly and outwardly of said row of apertures and close 1y fitting the side wall of'the rotor between the inlet and outlet, said casing having'an unobstructed channel formed therein along side the row of apertures in the rotor and, outlet on each.

extending from the inlet to the side of the rotor.

2. A rotary pump comprlsing a rotor having an annular row of transverse apertures therein, and a casing provided with aninlet and an outlet and having walls closely over-' lying the face of the disc inwardly and outwardlybf said row of apertures and between the inlet and outlet, the opposite walls of saidcasing having channels alongside saidrow of apertures which form unobstructed passages from the inlet to the outlet.

3. A rotary pump comprising a rotor in the form of a disc having transverse apertures closely spaced throughout its circumference, saidapertures being elongated and extending inwardly from adjacent the circumference of the disc, a casing havinga peripheral inlet and a peripheral outlet adiacent the inlet and having. side walls closely overlying the opposite side faces of the aperw l tured portion of the disc, each of said walls having a channel extending circumferential ly alongside the apertured portion of the. disc from the inlet to the outlet, each'of said side walls lying closely adjacent the faceof the discon opposite sides ofthe channel and lying closely adjacent the apertured portion of the disc between the inlet and outlet, said inlet and outlet being s aced apart circumferentially a distancesu cient'to permit the "overlying side walls of the casing to cover a plurality ofrotor apertures between the inletand outlet.

4. A rotary pump comprising a rotor having apertures "extending transversely therethrough and closely spaced throughout the circumference of the rotor, a casingformed of mated sectionshaving an vinlet and an outlet and a channel overlying each side of the apertured portion of the rotor, said channels extending circul nferentialls along each face of the rotor from the inlet to the outlet, the side walls of'said casing making a close working fit with the opposite faces of the apertured portion of the rotor between the inlet and outlet portions of said channels and the sides of the rim portion of said rotor and said casing engaging in a running fit throughout its periphery. v 5. A rotary pump comprising a rotor having closely spaced elongated transverse apertures each extending inwardly from adjacent the periphery of the rotor and throughout the circumference thereof, the apertured portion of said rotor having side faces in planes perpendicular to theaxis thereof, and a casing having flat side walls closely overlying the opposite side faces of the apertured portion of the rotor, said casing being provided with an inlet and an outlet and said side walls with channels extending circumferentially alongside the apertured portion of the rotor from the inlet to the outlet, said inlet and outlet being spaced circumferentially a suflicient/distance to provide flat wall portions closely overlying a plurality of apertures.

In testimony whereof I afiix my signature WILLIAM I. DERRICK 

